put https://fhir-api.zapehr.com/r4b/ObservationDefinition/
ObservationDefinition on the FHIR specification website.
Set of definitional characteristics for a kind of observation or measurement produced or consumed by an orderable health care service.
The body should be a valid FHIR object for ObservationDefinition.
Here is an example:
{
"resourceType": "ObservationDefinition",
"id": "example",
"text": {
"status": "generated",
"div": "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative with Details</b></p><p><b>id</b>: example</p><p><b>code</b>: Glucose [Moles/volume] in Blood <span>(Details : {LOINC code '15074-8' = 'Glucose [Moles/volume] in Blood', given as 'Glucose [Moles/volume] in Blood'})</span></p></div>"
},
"code": {
"coding": [
{
"system": "http://loinc.org",
"code": "15074-8",
"display": "Glucose [Moles/volume] in Blood"
}
]
}
}
You can reference the FHIR documentation to determine the format for ObservationDefinition.